JPS6288745A - Controller for copying machine - Google Patents

Abstract

PURPOSE:To prevent any trouble attributable to a paper jam and any damage to a both-sided tray driving system from occurring, by performing a paper-jam warning indication at a time when a both-sided tray exists in a delivery position at the time of starting a surface copy and copying paper is left behind in the both-sided tray. CONSTITUTION:Copying paper whose surface copy is over is stacked up on a both-sided tray 7 in consecutive order, and when the copying paper is stacked up as much as the setting number of sheets, the both-sided tray situated in an A position moves to a delivery position for taking the backside copy. The copying paper on the both-sided tray situated in a B position is fed to a transfer part of a sensitizing drum 6 in consecutive order from the paper at the topmost position and, after a copy image is transferred to the backside at the transfer part, it is fixed by each of fixing rolls 8 and 9, then discharged to the specified paper discharge tray 11 by way of a guide chute 10. Whether the both-sided tray 7 is situated in the A position or not is judged on the basis of a receiving position tray sensor 12 as well as whether the tray 7 is situated in the B position or not is judged on the basis of a delivery position tray sensor 13.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is for making a back side copy of a copy paper that has been copied on the front side, by using a double-sided tray that has received the copy paper after the front side copy has been completed. The present invention relates to a control device for a copying machine that moves to a sending position.

1. Copying machines that selectively form copy images on one side or both the front and back sides of copy paper are known.

This copying machine is equipped with a double-sided tray for temporarily storing copy paper on which the front side has been copied until the back side is copied.
Some types are fixed to the copying machine body, while others are movable.

The configuration of a copying machine equipped with a movable double-sided tray is as follows, for example. First, copy paper of a predetermined size is supplied from the paper feed tray to the copying machine main body, and the copy paper is sent to the transfer section of the photosensitive drum, where the copy image is transferred to the surface and then fixed by the fixing roll. Stored in a double-sided tray.

The copy sheets that have undergone front-side copying are sequentially stacked on the duplex tray, and when a set number of sheets have been stacked, the double-sided tray is then moved to a predetermined delivery position for making front-side copies.

The copy paper sent out from the double-sided tray at this delivery position is sent to the transfer section of the photosensitive drum in order, for example, starting from the top one, and after the copy image is transferred to the back side of the copy paper at the transfer section, the copy paper is transferred to the fixing roller. After the image is fixed, it is ejected to the paper ejection tray.

Once the copy paper has been copied on both the front and back sides,
The duplex copying operation is sequentially stacked on the paper output tray, and when the stacked copy sheets reach a set number, the duplex copying operation is terminated.

However, in conventional copying machine control devices, if the duplex copying operation is canceled using the all clear key after the front side copying is completed, the copy paper on which the front side copying has been completed remains in the duplex tray. is maintained.

After this, when making a single-sided copy, after the duplex tray moves to the delivery position, the copy paper in the duplex tray remains, and new copy paper is supplied from the paper feed tray to make a single-sided copy. After the operation has started and the copying operation on one side has been completed, the copy paper is ejected to the paper ejection tray.

If a double-sided copy is to be made again after this, the double-sided tray in which the copy paper remaining after the previous front-side copying is moved from the sending position to the receiving position causes the following problem.

That is, when the duplex tray moves from the sending position to the receiving position, there is a risk that the copy paper on the duplex tray may fall and be caught between the duplex tray and the paper output tray. If the copy paper gets caught between the duplex tray and the paper ejection tray, a problem arises in that the movement of the duplex tray causes a failure of the copying machine and damage to the duplex tray drive system.

The present invention has been made in view of such conventional problems, and aims to prevent copying paper on a duplex tray from causing a paper jam, resulting in failure of the copying machine and damage to the duplex tray drive system. With the goal.

Means for Solving the Problems A control device for a copying machine according to the present invention receives copy paper on which a front side copy has been made into a duplex tray, moves the duplex tray that has received the copy paper to a delivery position, and moves the copy paper that has received the copy paper to a delivery position. When the duplex tray is in the feed position and copy paper remains in the duplex tray when the front side copy operation in the duplex copy mode starts, a paper jam warning is displayed on the display. display,
The paper jam warning display on the display is configured to be erased by the opening/closing operation of the ink lock switch on the alligator side and the opening/napping operation of the ejection side interlock switch on the main body of the copying machine.

According to the present invention, the copy paper on which the front side copy has been made is first received into the double-sided tray located at the receiving position.

Next, suppose that the operator turns on the all-clear key for some reason, and then turns on the start button to perform one-sided copying. Then, the duplex tray moves to the delivery position with the copy paper on which the front side copy has been made during the previous duplex copying carried thereon.

Next, when the operator turns on the duplex copy selection key and turns on the start button to perform front side copying, a paper jam warning message is displayed on the display.

In this case, the paper jam warning display is cleared (erased) by the opening/closing operation of the alligator side interlock switch and the opening/closing operation of the copy paper ejection side interlock switch.

In other words, the paper jam warning display is not cleared only by opening and closing the alligator side interlock switch, but by opening and closing both the alligator side interlock switch and the copy paper ejection side interlock switch. .

Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an example of a schematic configuration of a copying machine to which the control device of the present invention is applied, and FIG. 2 shows a portion of its console panel.

In the figure, 1 is the main body for copying, 2 and 3 are paper feed trays, 4 and 5 are paper feed trays, 6 is a photosensitive drum, and 7 is a copy paper used until the front side copy is completed and the back side copy is made on the copy paper. 11 is a paper discharge tray.

The basic configuration of this copying machine will be explained based on a double-sided copying operation. First, paper feed tray 2 or 3
The bee paper is fed into the copying machine main body 1 from the photosensitive drum 6, and after a copy image is transferred to the surface thereof, it is transferred to the fixing roll 8 by a conveyor belt (not shown).
After being sent to the printer 9 and fixed, it is stored in the double-sided tray 7 located at the receiving position 1N (position A).

The copy paper that has been copied on the front side is transferred to the double-sided tray 7.
When the set number of copy sheets are stacked on top of each other, the duplex tray 7 at the 8th position moves to the delivery position 1 (position B) for making a backside copy.

The copy sheets on the double-sided tray 7 at position B are sequentially sent to the transfer section of the photosensitive drum 6, starting from the top one, for example, and after the copy image is transferred to the back side at the transfer section, it is fixed [1-8.
The paper is discharged to a predetermined paper discharge tray 11 via a trailing guide chute 10 defined by 9. This completes a series of double-sided copying operations for the front and back sides.

Whether the double-sided tray 7 is at the 8th position is determined based on the receiving position tray sensor 12, and whether the double-sided tray 7 is at the 8th position is determined based on the delivery position tray sensor 13. Incidentally, reference numeral 14 denotes a paper sensor C that detects whether or not copy paper is set on the double-sided tray 7 located at position B.

Further, as shown in FIG. 4, the copying machine main body 1 is provided with an alligator interlock switch 28 that is turned on when the F section frame 27 is opened about the fulcrum a with respect to the lower frame 26. The copying machine equipped with the sorter 29 is provided with a sorter interlock switch 38 that is turned on when the sorter 29 is centered. Sorter 29
is an option, and in the case of the copying machine main body 1 which does not have the sorter 29 as shown in FIG.

As shown in FIG. 2, the console panel 15 of the copying machine body 1 includes a numeric keypad 16, a start button 17, an interrupt key 18, a stop key 19, an all clear gear 20,
A first display 21, a second display 22, a double-sided selection key 23, a stack key 24, and a combination key 25 are provided.

The control device 30 that controls the copying machine main body 1 is composed of a microcomputer as shown in FIG.
, a read-only memory (ROM) 32 , and a random access memory (RAM) 33 . Of these, the ROM 32 contains programs such as copy operation routines, etc.
Various fixed data, constants, etc. necessary for these processes are stored. Furthermore, inside the microcomputer, there is an alligator interlock switch [1 switch 28, sorter interlock switch 38 or double-sided tray interlock switch 39].
, duplex selection key 23, tray sensors 12 and 13, paper sensor 14, all clear key 20, etc.
an output interface 36 for inputting to J31;
The signal from CPLJ31 is sent to the tray moving motor 35, the first
An output interface 37 for outputting to the display 21, second display 22, etc. is included. The latest detection data from the tray sensors 12 and 13, paper sensor 14, all clear key 20, etc. is taken into the RAM 33, and these data are stored in a predetermined area.

The CPU 31 controls the operation of the copying machine body 1 based on the data detected by various sensors according to a program stored in the ROM 32.The CPU 31 also controls the operation state of the copying machine body 1. Tray moving motor 35 through output interface 37 based on
, and sends predetermined drive signals and work information signals to the first and second displays 21, 22, etc.

Next, referring to the flowchart shown in FIG.
An example of the operation of a copying machine controlled by 0 will now be described.

First, when the second display 22 of the console panel 15 displays "Surface copy possible" (step 41), turn on the start button 17 (step 42), and the duplex tray 7 moves from position 8 to position A. Then, in step 43), a surface copy operation is started. Next, it is determined whether the front side copying operation has been completed (step 44).
), it is assumed that the operator turns on the all clear key 20 for some reason after finishing the front copy operation (step 45).

Then, the message "Single-sided copy available" is displayed (step 46), and then the start button 17 is turned on (step 47), and the double-sided tray 7 is moved from position A to position B (step 48).

It is determined whether one-sided copying has been completed (step 49).
), if one-sided copying has been completed, turn on the double-sided selection key 23 (step 50), and the second display 22 will display "Surface copy ready" (step 5).
1).

Next, when the operator turns on the start button 17 (step 52), it is determined whether or not the duplex tray 7 is in the B position (step 53), and if the duplex tray 7 is in the B position, then copying is made to the duplex tray 7. It is determined whether any paper remains (step 54). At this time, if any copy paper remains in the double-sided tray 7, the operation of the copying machine main body 1 is stopped (step 55).

Then, a paper jam is displayed on the first display 21 (step 56), and the jam display in this case is a warning that copy paper remains at the claw position or B position of the duplex tray 7. be.

Next, a routine for clearing the paper jam indication when such a paper jam indication is made will be described based on the No. 1 Nolow chart shown in FIG.

First, when copy paper remains on the duplex tray 7 (step 71), a message indicating that a paper jam has occurred at the claw position or position B is displayed on the third display (not shown) (step 72).

Next, it is determined whether the copying machine main body 1 is equipped with a sorter (step 73), and if it is equipped with a sorter, it is determined whether the alligator interlock switch 28 and the sorter in clock switch 38 have performed the closing operation and the closing operation, respectively. It is determined whether (steps 74 to 77). If the alligator interlock switch 28 and the sorter interlock switch 38 have both opened and closed, that is, if the operator has opened and closed the alligator and the sorter 29 (steps 74 to 77), both sides It is determined whether or not copy paper remains in tray 7 (step 78). If there is no copy paper remaining on the duplex tray γ, the third
The paper jam indication on the display is cleared (step 79).
). On the other hand, if there is any bee paper remaining on the duplex tray 7, the paper jam message continues to be displayed on the third display (step 72).

If the copying machine body 1 does not have a sorter (step 7)
3) It is determined whether both the alligator interlock switch 28 and the double-sided tray interlock switch 39 have performed the opening/closing operation (steps 80 to 83), and both the alligator interlock switch 28 and the double-sided tray interlock switch 39 have been opened and closed. If the opening and closing operations have been performed, that is, if the alligator has been opened and closed and the duplex tray has been opened and closed, it is determined whether or not copy paper remains on the duplex tray 7 (step 84).

If no copy paper remains on the duplex tray 7, the paper jam display on the third display is cleared (step 85).
On the other hand, if there is any paper left on the double-sided tray 7, a paper jam continues to be displayed on the third display (step 72).

When the operator removes the copy paper remaining in the duplex tray 7-h in this way, the message "Surface copy is not available" is displayed on the second display 22 (step 57 in FIG. 6), and then the start is started. When the button 17 is turned on (step 59), the duplex tray 7 moves from position B to position A (step 60).When the front side copy operation is completed (step 61), the routine shown in FIG. 6 is completed.

According to this routine, when starting a front copy operation, if there is any copy paper left on the duplex tray 7, the operation of the copying machine is stopped without moving the duplex tray 7. , to avoid the situation where the copy paper in the duplex tray 7 is caught between the duplex tray 7 and the paper output tray 11 when the duplex tray 7 moves, and to
breakdown or damage to the tray drive system can be prevented.

In addition, when the duplex tray is in the delivery position and there is copy paper remaining in the duplex tray at the start of the front side copy operation in the duplex copy mode, a paper jam warning is displayed on the third display. The paper jam display is cleared by the opening/closing operation of the interlock switch and the opening/closing operation of the copy paper ejection side interlock switch (sorter interlock switch 38 or duplex tray ivy [cock switch 39)]. , it is necessary to check whether or not a paper jam has occurred at two locations, A position and 8 position. Therefore, there is no possibility that the paper jam display will disappear while copy paper remains at A position. .

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, if the duplex tray is in the feed position δ and copy paper remains in the duplex tray when front side copying is started in the duplex copy mode, a paper jam warning is displayed on the display. In this case, the condition for clearing the paper jam warning display was the opening/closing of the two interlock switches on the alligator mouth side and the discharge side, so either the alligator mouth side interlock switch or the discharge side interlock switch This has the effect of avoiding a situation where the paper jam warning display is cleared only by opening and closing the interlock switch.

Therefore, even if a paper jam occurs inside the copying machine, the paper jam display can be cleared by simply opening and closing the alligator side interlock switch or the ejection side interlock switch. This has the advantage that such malfunctions are unlikely to occur. This makes it possible to prevent copying machine failure and damage to the duplex tray drive system due to copy paper jams.

[Brief explanation of drawings]

Fig. 1 is a schematic block diagram of a copying room showing an embodiment of the present invention, Fig. 2 is a partial schematic block diagram showing two parts of the copying machine shown in Fig. 1, and Fig. 3 is an embodiment of the present invention. FIG. 4 is a schematic block diagram of a copying machine with a sorter; FIG. 5 is a schematic diagram of a copying machine without a sorter; FIG. 6 is a block diagram of a copying machine without a sorter; FIG. 7 is a flowchart showing the copying 1jl operation in the embodiment. 1... Copying machine main body, 2.3... Paper feed tray,
6...Photosensitive drum, 7...Double-sided tray,
8.9... Fixing roll, 11... Output tray,
12... Receiving position tracing sensor, 13... Delivery position tracing sensor, 14... Paper sensor, 15... Console panel, 28... Crocodile interlock [] cock switch 30...
-Control device, 31... Central processing unit (CPU), 32... Read only memory (ROM), 33... Random access memory (RAM), 38... Sorter interlock switch (discharge side interlock switch), 39...Double-sided tray interlock switch (discharge side interlock switch).

Claims (1)

[Claims] A copying machine in which the copy paper on which the front side copy has been made is received in a duplex tray, the duplex tray that has received the copy paper is moved to a delivery position, and the copy paper is sent out from the delivery position to make a copy on the back side. In the machine control device,
When the duplex tray is in the delivery position and there is copy paper remaining in the duplex tray at the start of the front side copy operation in duplex copy mode, a paper jam warning is displayed on the display, and this display's paper jam warning display is interlocked on the alligator side. A control device for a copying machine, characterized in that erasing is performed by opening and closing a switch and opening and closing an interlock switch on the discharge side of the copying machine main body.